Abstract:
Twelve genotypes of Onion (Allium cepa L.) were evaluated to study the evaluation
of genotypes based on morpho-physiogenic traits at Sher-e-Bangla Agricultural
University, Dhaka during December 2016 to April 2017. In this experiment twelve
onion genotypes were used as experimental materials. The experiment was laid out in
Randomized Complete Block Design (RBCD) with three replications. Mean
performance, variability, genotypic and phenotypic correlation coefficient and path
analysis on different yield contributing characters and yield of onion genotypes were
estimated. The highest bulb yield/plant (48.93) was recorded in the genotype of Laltir
King, whereas the lowest bulb yield/plant (8.6) from the genotype of BARI Piaj 3.
Phenotypic coefficient of variation was higher than the genotypic coefficient of
variation for all the yield contributing traits. In correlation study, yield per bulb
positively and significantly correlated with plant height (0.703 and 0.648), root length
(0.370 and 0.344), no. of leaves (0.906 and 0.823), leaf length (0.674 and 0.618), leaf
breadth (0.738 and 0.519), bulb length (0.869 and 0.728), bulb diameter (0.931 and
0.807) and dry weight per bulb (0.929 and 0.897) at both genotypic and phenotypic
levels respectively. Path coefficient analysis revealed to that plant height had direct
positive effect (5.058), root length had direct positive effect (0.263), no. of leaves had
direct positive effect (1.129) and dry weight per bulb had direct positive effect (0.44)
on yield per bulb, indicating these are the main contributors to yield per bulb.
Description:
A Thesis
submitted to the Faculty of Agriculture,
Sher-e-Bangla Agricultural University, Dhaka
in partial fulfillment of the requirements
for the degree of
MASTER OF SCIENCE
IN
GENETICS AND PLANT BREEDING
SEMESTER: July-December, 2016
